So many people have asked about this, and the answer was probably Never. This link should probably explain everything. Curse you Steam, for rejecting this Wonderful and Wholesome Game.
https://steamcommunity.com/discussions/forum/0/3761103414980761640/?ctp=3
If you wanna support the game, you can become a member through Patreon and SubscribeStar or buy Merch from here.
From my perspective, I think this is better actually. If this game was on Steam then we only need to pay for it once and then that's it. If the game is not selling very well, the game can be abandoned at any moment even if the game wasn't finished yet. But when it comes to Patreon and SubscribeStar, it's a monthly paid and this will keep this game alive. I wish there was a 3rd option though, specifically Membership on YouTube. (Here is the link to Official Incontinent Cell YouTube Channel)
If any of the Devs. reading this, pleeeease add a Membership on YouTube. I'm Thai and Patreon and SubscribeStar needs PayPal and PayPal is very very hard to get your hands on these days in Thailand.
Edits : Tomorrow I finally have some free time to go to the bank, and I hope I will finally have my PayPal Account working properly. I'll definitely become a Member on Patreon, and later if I save enough money I will also buy some Merch.